AN IMAGING K-BAND SURVEY - II: THE REDSHIFT SURVEY AND GALAXY EVOLUTION IN THE INFRARED

Karl Glazebrook; J. A. Peacock; L. Miller; C. A. Collins

doi:10.1093/mnras/275.1.169

paper

AN IMAGING K-BAND SURVEY - II: THE REDSHIFT SURVEY AND GALAXY EVOLUTION IN THE INFRARED

arXiv:astro-ph/9502094 · doi:10.1093/mnras/275.1.169

Abstract

We present a redshift survey of 124 galaxies, from an imaging $K$ -band survey complete to $K ≃ 17.3$ . The optical-to-infrared colours are consistent with the range expected from synthetic galaxy spectra, although there are some cases of very red nuclei. Our data show no evidence for evolution of the $K$ -band luminosity function at $z < 0.5$ , and the results are well described by a Schechter function with $M_{K}^{*} = - 22.75 \pm 0.13 + 5 lo g_{10} h$ and $ϕ^{*} = 0.026 \pm 0.003 h^{3} Mp c^{- 3}$ . This is a somewhat higher normalization than has been found by previous workers, and it removes much of the excess in faint $K$ and $B$ counts with respect to a no-evolution model. However, we do find evidence for evolution at $z > 0.5$ : $M_{K}^{*}$ is approximately 0.75 mag. brighter at $z = 1$ . This luminosity evolution is balanced by a reduced normalization at high redshift. The overall evolution is thus opposite to that expected in simple merger-dominated models.

MNRAS in press. 15 pages plain TeX plus 12 figures. PostScript version available from ftp://ftp.roe.ac.uk/pub/jap/klf or from ftp://xxx.lanl.gov/astro-ph/ps/9502/9502094.ps.gz or http://xxx.lanl.gov/ps/astro-ph/9502094

AN IMAGING K-BAND SURVEY - II: THE REDSHIFT SURVEY AND GALAXY EVOLUTION IN THE INFRARED

Abstract

Cited by in corpus (70)